CN102182480B

CN102182480B - Mortar anchor constructing method

Info

Publication number: CN102182480B
Application number: CN 201110114074
Authority: CN
Inventors: 辛振省; 郑保才
Original assignee: China Railway No 3 Engineering Group Co Ltd
Current assignee: China Railway No 3 Engineering Group Co Ltd
Priority date: 2011-05-04
Filing date: 2011-05-04
Publication date: 2013-03-13
Anticipated expiration: 2031-05-04
Also published as: CN102182480A

Abstract

The invention belongs to the technical field of mortar anchor construction in tunnel and underground engineering and side slope engineering, in particular to a mortar anchor constructing method. By the method, the problem that the mortar anchor constructing method has difficulty in ensuring engineering quality in the prior art is solved. The method accomplishes mortar anchor construction by using a frustum-shaped location plug consisting of an upper part and a lower part; the upper part of the location plug has a hard wedge structure; the lower part of the location plug is made of elastic material; and a through hole is formed in the lower part of the location plug along the mortar-injecting direction. The method disclosed by the invention is low in cost, simple and easy in operation and easy in popularization; the economic benefit and social benefit of the method are outstanding in the current large-scale tunnel and underground engineering and side slope engineering; and the popularization value of the method is very high.

Description

A kind of mortar anchor constructing method

Technical field

The invention belongs to the technical field of tunnel and underground construction and slope project grouting rock bolt construction, be specifically related to a kind of mortar anchor constructing method.

Background technology

Along with the day of land resources is becoming tight, increasing traffic lines planning can not occupy cultivated land in a large number again, so traffic engineering often need to be built in the mountain region, inevitably need in the engineering construction to adopt the mode of tunnel or side slope to carry out design and construction, in the engineering construction field, the proportion that tunnel and underground construction and slope project account for is increasing.In numerous tunnels and Slope Construction engineering, all need to adopt grouting rock bolt to realize the stable of country rock as support system, so at present grouting rock bolt support is the support system of generally using in tunnel or the slope project.

The grouting rock bolt system main construction method of using at present is: arrange first the position, hole of anchor pole, and according to the position and the angular hole-boring that design, the grouting pump pipeline is connected again that then the wetting pipeline of water and thin pulp is inserted to Grouting Pipe at the bottom of the square again.Slowly open valve and begin slip casting.Under pressure promoted, water was front, and mortar is rear, the moistening pump housing of water and pipeline, and the guiding mortar enters in the anchor hole, and along with mortar constantly is pressed into the eyeground, Grouting Pipe and then slowly withdraws from eyelet, until after mortar fills with eyelet.Immediately anchor pole is inserted eyelet, then with the method that pushes away, thumps, anchor pole is inserted to the eyeground.Then stop up the aperture with timber wedge, prevent that mortar runs off.

But in the site operation process, anchor pole needs hammering in the location, and the hammering vibrations cause mortar segregation and the mortar outflow of anchor pole easily, and locate failure in a lot of situation, secondary is located so that the bond stress of the mortar of initial set and anchor pole lost efficacy, so that the support system of whole grouting rock bolt lost efficacy; Moreover hammering is larger to original unsettled country rock disturbance, causes that easily country rock caves in; In addition it is lack of standardization to stop up the employed timber wedge size in aperture, can not play due effect.The lighter need to do over again, and severe one causes engineering accident.

Summary of the invention

There are the problems referred to above in the present invention in order to solve existing mortar anchor constructing method, be difficult to guarantee workmanship, a kind of mortar anchor constructing method is provided, with easy method anchor pole is accurately located during insertion, the seal anchors aperture prevents the slurries outflow simultaneously, reaches the safely and fast purpose of construction when guaranteeing workmanship.

The present invention adopts following technical scheme to realize:

Mortar anchor constructing method, step is as follows:

1), arrange the position, hole of anchor pole, and form anchor hole according to position and the angular hole-boring of design;

2), slip casting in the anchor hole;

3), prepare limit plug, limit plug is made of the upper and lower two parts that can form the frustum shape, limit plug top is divided into the wedge structure of hard, part is made by elastomeric material under the limit plug, part is along having through hole on the slip casting direction under the limit plug;

4), slip casting is about to extract Grouting Pipe when full out, Grouting Pipe filled in the through hole of part under the limit plug, then part under the limit plug is filled in the anchor hole mouth, and compresses;

5), continue slip casting, treat that slurries wedge shape space of part top under the limit plug flows out, part on the limit plug of wedge structure is extracted Grouting Pipe beyond the Great Wall, inserts simultaneously anchor pole;

6), treat that slurries solidify the construction of then finishing grouting rock bolt.

The present invention has following beneficial effect: it is set to up and down two parts to the sealing positioner that the present invention adopts dexterously, and top is divided into hard, the bottom is divided into elastic body, so in the work progress that it is finished, when being about to the nature outflow, mortar fills in the fullness degree that the bottom elastic part has in time guaranteed slurries, guaranteed the construction quality of grouting rock bolt, go up simultaneously the part wedge structure as interim exhaust plant, further guarantee mortar construction enforcement; Simultaneously a whole set of closure system can be so that anchor bolt construction be just can be in design attitude through the external force vibrations, and is in the slurries centre position, the common fault of avoiding disturbance that the hammering in the conventional method brings to country rock and stopper to be difficult to the jam-pack aperture; So the present invention guarantees construction quality to greatest extent from construction technology or from the angle of construction mechanics.This method is cheap, and is simple to operation, very easily promotes, and its economic benefit and social benefit are particularly outstanding, of far-reaching significance in current extensive tunnel and underground construction and slope project, and high promotional value is arranged.

Description of drawings

Fig. 1 is the schematic diagram that becomes anchor hole according to the bolthole position

Fig. 2 is the schematic diagram of slip casting in the anchor hole

Fig. 3 is the structural representation of limit plug

Fig. 4 fills in the schematic diagram that continues slip casting behind the limit plug

Fig. 5 is sealing anchor hole aperture and the schematic diagram that inserts anchor pole

Among the figure: 1-country rock, 2-anchor hole, 3-Grouting Pipe, 4-slurries, part on the 5-limit plug, part under the 6-limit plug, 7-through hole, 8-anchor pole.

The specific embodiment

By reference to the accompanying drawings the specific embodiment of invention is described further.

Mortar anchor constructing method, step is as follows:

1, arrange first the position, hole of anchor pole 8, and according to the position and the angular hole-boring that design, as shown in Figure 1.

2, the grouting pump pipeline is connected, the wetting pipeline of water and thin pulp then is inserted to Grouting Pipe 3 the anchor hole bottom more again, slowly open valve and begin slip casting, on one side slip casting slowly extract Grouting Pipe 3 out according to the slurries amount on one side, until slurries are full.

3, prepare limit plug, limit plug is made of the upper and lower two parts that can form the frustum shape, and part 5 is the wedge structure of hard on the limit plug, and part 6 is made by elastomeric material under the limit plug, part 6 is along having through hole 7, as shown in Figure 3 under the limit plug on the slip casting direction.Whole limit plug rear portion diameter is more bigger than anchor hole mouth.

4, slip casting is about to extract out when full Grouting Pipe 3, Grouting Pipe 3 is filled in the through hole 7 of part 6 under the limit plug, part under the limit plug 6 is filled in anchor hole mouth and compression, part 5 is not filled in first on the limit plug, then continue slip casting, the gas that slip casting is got rid of wedge shape space of part 5 tops under the limit plug is discharged, as shown in Figure 4.

5, treat that slurries 4 flow out from the top wedge shape space, illustrate that slurries are full, beyond the Great Wall part 5 on the limit plug of hard wedge structure, insert ready anchor pole 8 when extracting Grouting Pipe 4, then anchor pole is positioned and fills in the location, as shown in Figure 5, treats that slurries solidify the construction of then finishing grouting rock bolt.

Claims

1. mortar anchor constructing method is characterized in that step is as follows:

1), arrange the position, hole of anchor pole (8), and form anchor hole (2) according to position and the angular hole-boring of design;

2), to the interior slip casting of anchor hole (2);

3), prepare limit plug, limit plug is made of the upper and lower two parts that can form the frustum shape, part (5) is the wedge structure of hard on the limit plug, and part (6) is made by elastomeric material under the limit plug, and part (6) is along having through hole (7) on the slip casting direction under the limit plug;

4), slip casting is about to extract Grouting Pipe (3) when full out, Grouting Pipe (3) filled in the through hole (7) of part (6) under the limit plug, then part (6) under the limit plug is filled in the anchor hole mouth, and compresses;

5), continue slip casting, treat that slurries (4) wedge shape space of part (6) top under the limit plug flows out, part (5) on the limit plug of wedge structure is extracted Grouting Pipe (3) beyond the Great Wall, inserts simultaneously anchor pole (8);

6), treat that slurries (4) solidify the construction of then finishing grouting rock bolt.